Quantum entanglement for continuous variables sharing in an expanding spacetime

• URL: http://arxiv.org/abs/2303.09924v1
• Date: Fri, 17 Mar 2023 12:23:35 GMT
• Title: Quantum entanglement for continuous variables sharing in an expanding spacetime
• Authors: Wen-Mei Li, Rui-Di Wang, Hao-Yu Wu, Xiao-Li Huang, Hao-Sheng Zen, Shu-Min Wu
• Abstract summary: We analytically study the generation and redistribution of Gaussian entanglement of the scalar fields in an spacetime. We find that quantum entanglement is more sensitive to the expansion rate than the expansion volume. These results can guide the simulation of the expanding universe in quantum systems.
• Score: 2.2998722397348335
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Detecting the structure of spacetime with quantum technologies has always been one of the frontier topics of relativistic quantum information. Here, we analytically study the generation and redistribution of Gaussian entanglement of the scalar fields in an expanding spacetime. We consider a two-mode squeezed state via a Gaussian amplification channel that corresponds to the time-evolution of the state from the asymptotic past to the asymptotic future. Therefore, the dynamical entanglement of the Gaussian state in an expanding universe encodes historical information about the underlying spacetime structure, suggesting a promising application in observational cosmology. We find that quantum entanglement is more sensitive to the expansion rate than the expansion volume. According to the analysis of quantum entanglement, choosing the particles with the smaller momentum and the optimal mass is a better way to extract information about the expanding universe. These results can guide the simulation of the expanding universe in quantum systems.

Related papers

• Digital quantum simulation of cosmological particle creation with IBM quantum computers [0.0]
  We consider a system consisting of a minimally coupled massive quantum scalar field in a spacetime undergoing homogeneous and isotropic expansion. We simulate two vibration modes, positive and negative for a given field momentum, by devising a quantum circuit that implements the time evolution. We study the number of particles created after the universe expands at a given rate, both by simulating the circuit and by actual experimental implementation on IBM quantum computers.
  arXiv  Detail & Related papers  (2024-10-03T11:56:07Z)
• Quantum fluctuation theorem in a curved spacetime [0.0]
  We report a fully general relativistic detailed quantum fluctuation theorem based on the two point measurement scheme. We demonstrate how the spacetime curvature can produce entropy in a localized quantum system moving in a general spacetime.
  arXiv  Detail & Related papers  (2024-05-06T23:16:50Z)
• Quantum Isotropic Universe in RQM Analogy: the Cosmological Horizon [0.0]
  We investigate the quantum dynamics of the isotropic Universe in the presence of a free massless scalar field. We show how the introduction of a "turning point" in the Universe evolution allows to overcome an intrinsic ambiguity in representing the expanding and collapsing Universe.
  arXiv  Detail & Related papers  (2024-04-10T14:45:56Z)
• Free expansion of a Gaussian wavepacket using operator manipulations [77.34726150561087]
  The free expansion of a Gaussian wavepacket is a problem commonly discussed in undergraduate quantum classes. We provide an alternative way to calculate the free expansion by recognizing that the Gaussian wavepacket can be thought of as the ground state of a harmonic oscillator. As quantum instruction evolves to include more quantum information science applications, reworking this well known problem using a squeezing formalism will help students develop intuition for how squeezed states are used in quantum sensing.
  arXiv  Detail & Related papers  (2023-04-28T19:20:52Z)
• Analog de Sitter universe in quantum Hall systems with an expanding edge [0.0]
  Expanding edges in quantum Hall systems can become a simulator of quantum 1+1 dimensional expanding universes. We investigate Hawking radiation and entanglement behavior predicted by this model.
  arXiv  Detail & Related papers  (2023-01-23T04:44:37Z)
• Quantum field simulator for dynamics in curved spacetime [0.0]
  We show a quantum field simulator in a two-dimensional Bose-Einstein condensate with a trap and adjustable interaction strength. We explicitly show the realisation of spacetimes with positive and negative spatial curvature by wave packet propagation. We find quantitative agreement with new analytical predictions for different curvatures in time and space.
  arXiv  Detail & Related papers  (2022-02-21T17:52:50Z)
• Neural-Network Quantum States for Periodic Systems in Continuous Space [66.03977113919439]
  We introduce a family of neural quantum states for the simulation of strongly interacting systems in the presence of periodicity. For one-dimensional systems we find very precise estimations of the ground-state energies and the radial distribution functions of the particles. In two dimensions we obtain good estimations of the ground-state energies, comparable to results obtained from more conventional methods.
  arXiv  Detail & Related papers  (2021-12-22T15:27:30Z)
• Time and Evolution in Quantum and Classical Cosmology [68.8204255655161]
  We show that it is neither necessary nor sufficient for the Poisson bracket between the time variable and the super-Hamiltonian to be equal to unity in all of the phase space. We also discuss the question of switching between different internal times as well as the Montevideo interpretation of quantum theory.
  arXiv  Detail & Related papers  (2021-07-02T09:17:55Z)
• Preparing random states and benchmarking with many-body quantum chaos [48.044162981804526]
  We show how to predict and experimentally observe the emergence of random state ensembles naturally under time-independent Hamiltonian dynamics. The observed random ensembles emerge from projective measurements and are intimately linked to universal correlations built up between subsystems of a larger quantum system. Our work has implications for understanding randomness in quantum dynamics, and enables applications of this concept in a wider context.
  arXiv  Detail & Related papers  (2021-03-05T08:32:43Z)
• Imaginary Time Propagation on a Quantum Chip [50.591267188664666]
  Evolution in imaginary time is a prominent technique for finding the ground state of quantum many-body systems. We propose an algorithm to implement imaginary time propagation on a quantum computer.
  arXiv  Detail & Related papers  (2021-02-24T12:48:00Z)
• Projection evolution and quantum spacetime [68.8204255655161]
  We discuss the problem of time in quantum mechanics. An idea of construction of a quantum spacetime as a special set of the allowed states is presented. An example of a structureless quantum Minkowski-like spacetime is also considered.
  arXiv  Detail & Related papers  (2019-10-24T14:54:11Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.